GEOLOGY

Detailed explanation-1: -Increase the number of coil turns. Increase the current flowing through the coil. Wrap the coil tightly around the iron piece. Increase the current or voltage.

Detailed explanation-2: -You can add more coils on top of the first row, and this just adds more field strength. In technical terms, every coil of wire increases the “magnetic flux density” (strength) of your magnet. The magnetic field on the outside of the coil resembles a bar magnet.

Detailed explanation-3: -Reversing the way the battery is connected will reverse the poles of your electromagnet. The more turns of wire your magnet has, the better. Keep in mind that the further the wire is from the core, the less effective it will be. The more current that passes through the wire, the better.

Detailed explanation-4: -You can of course make a stronger electromagnet by adding batteries, but the strategy you would use depends on the relative resistances of the two components.

Detailed explanation-5: -The number of coils is likely to affect the results more than the number of batteries. When more coils are added around the core of the electromagnet, more atoms in the nail become polarized, resulting in a stronger magnet.